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- Path: sparky!uunet!usc!cs.utexas.edu!sun-barr!olivea!apple!applelink.apple.com
- From: V0645@AppleLink.Apple.COM (Tandem, Gary Campbell,PAS)
- Newsgroups: comp.sys.mac.oop.macapp3
- Subject: Re: RAM cache /Rapid Track
- Message-ID: <726296939.7547114@AppleLink.Apple.COM>
- Date: 6 Jan 93 04:57:00 GMT
- Sender: daemon@Apple.COM
- Organization: AppleLink Gateway
- Lines: 85
-
- Hi David,
-
- I have been experimenting with Insigna Solution's Rapid Trak
- ram cache/disk driver for the last two weeks to compile my large
- C++ MacApp 3.0.1 appilcation.
-
- It is a combination disk driver and ram cache, it must be installed
- by reformatting your hard disk with their driver to operate.
-
- It costs about $99 LIST, $66 mailorder US.
-
- My Application takes 20 minutes to compile and link on a 20 mb
- 50mh 60030 Daystar.
-
- The CPlus dump file is 2.8 mb,
- the .SYM file is 1.7 mb, and
- the application is .8 mb
-
- The size of these files have been a problem trying to use RAMDISKs and
- this ram cache because they are larger than the amount of ram I have
- left over in my 20mb system( LINK uses ~8-9 MB ).
-
- What I used to do was use every trick in Kent's tech note and then the
- following,
-
- I modified MA's build rules and dependencies move MacApp.lib to
- my RAMDISK before the LINK, and build the application's object
- on the ram disk.
-
- Also on the ramdisk were the CPlusScratch, MABUILD.temp files.
-
- After the LINK was over I duplicated the Application back to disk
- and purged MacApp.lib.
-
- I was basically trying to get the "hotest" files on a 6mb ram disk since
- I didn't have enough room to put every thing there.
-
- The compile and link time for 1 file( not the entire set ) was:
-
- 230 secs ( includes use a CPLUS -load file and duplicating the
- files between ram disk ).
-
- With Rapid Trak set to 3.5 mb, ( which my sources just barely fit in )
- and using a .5mb ram disk for the CPlusScratch file, and not running the
- 2.8 mb CPlus load file through Rapid Trak,
-
- the compile and link time is the same,
-
- 230 secs,
-
- This isn't a elapsed time improvement, but becomes an improvement when
- I rebuild more than one file because they use common ".h" files and the
- hit rate becomes 80-90% during the compiles.
-
- But it is an overall improvement because,
-
- o I get an improvement on more than one file rebuilt
- o Object Master's search function ( cmd L ) runs like a bat out of hhhh
-
- The drawbacks to RapidTrak are minor so far,
-
- 1 It works well with my SyQuest 88
- 2 And MPW
- 3 And MacApp
- 4 And The Debugger
-
- The drawback is,
-
- 1 It only allows a 4 mb ram cache ( fine with me but maybe not
- for 32 mb machines )
-
- 2 I haven't tested the formatters capability to reformat
- bad tracks which non-sealed SyQuest cartidges encounter from
- time to time.
-
- I can live with those
-
- 3 I had a couple of flakes with a 3 mb Rapid Track setting and doing
- a CPlus -loadc on my 2.8 mb dump file. I finally moved the
- dump file to a drive not with a Rapid trak cache.
-
- cheers,
- Gary Campbell
- Tandem Computers
-
-